source.c 32.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12
/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org, 
 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
 *                      Karl Heyes <karl@xiph.org>
 *                      and others (see AUTHORS for details).
 */

13
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
14 15 16 17
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

Jack Moffitt's avatar
Jack Moffitt committed
18 19 20 21
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
22
#include <ogg/ogg.h>
Michael Smith's avatar
Michael Smith committed
23
#include <errno.h>
24 25

#ifndef _WIN32
26
#include <unistd.h>
Jack Moffitt's avatar
Jack Moffitt committed
27
#include <sys/time.h>
28
#include <sys/socket.h>
29
#else
30 31
#include <winsock2.h>
#include <windows.h>
32
#define snprintf _snprintf
33
#endif
Jack Moffitt's avatar
Jack Moffitt committed
34

Karl Heyes's avatar
Karl Heyes committed
35 36 37 38
#include "thread/thread.h"
#include "avl/avl.h"
#include "httpp/httpp.h"
#include "net/sock.h"
Jack Moffitt's avatar
Jack Moffitt committed
39 40 41 42 43 44

#include "connection.h"
#include "global.h"
#include "refbuf.h"
#include "client.h"
#include "stats.h"
45
#include "logging.h"
46
#include "cfgfile.h"
47
#include "util.h"
Jack Moffitt's avatar
Jack Moffitt committed
48
#include "source.h"
Michael Smith's avatar
Michael Smith committed
49
#include "format.h"
Michael Smith's avatar
Michael Smith committed
50
#include "auth.h"
Jack Moffitt's avatar
Jack Moffitt committed
51

52 53 54
#undef CATMODULE
#define CATMODULE "source"

Michael Smith's avatar
Michael Smith committed
55 56
#define MAX_FALLBACK_DEPTH 10

57 58
mutex_t move_clients_mutex;

Jack Moffitt's avatar
Jack Moffitt committed
59 60 61
/* avl tree helper */
static int _compare_clients(void *compare_arg, void *a, void *b);
static int _free_client(void *key);
62
static void _parse_audio_info (source_t *source, const char *s);
Karl Heyes's avatar
Karl Heyes committed
63
static void source_shutdown (source_t *source);
Jack Moffitt's avatar
Jack Moffitt committed
64

65 66 67 68 69 70 71 72
/* Allocate a new source with the stated mountpoint, if one already
 * exists with that mountpoint in the global source tree then return
 * NULL.
 */
source_t *source_reserve (const char *mount)
{
    source_t *src = NULL;

73 74 75 76
    if(mount[0] != '/')
        WARN1("Source at \"%s\" does not start with '/', clients will be "
                "unable to connect", mount);

77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
    do
    {
        avl_tree_wlock (global.source_tree);
        src = source_find_mount_raw (mount);
        if (src)
        {
            src = NULL;
            break;
        }

        src = calloc (1, sizeof(source_t));
        if (src == NULL)
            break;

        src->client_tree = avl_tree_new(_compare_clients, NULL);
        src->pending_tree = avl_tree_new(_compare_clients, NULL);

        /* make duplicates for strings or similar */
        src->mount = strdup (mount);
        src->max_listeners = -1;

        avl_insert (global.source_tree, src);

    } while (0);

    avl_tree_unlock (global.source_tree);
    return src;
}


Michael Smith's avatar
Michael Smith committed
107 108 109 110
/* Find a mount with this raw name - ignoring fallbacks. You should have the
 * global source tree locked to call this.
 */
source_t *source_find_mount_raw(const char *mount)
Jack Moffitt's avatar
Jack Moffitt committed
111
{
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
    source_t *source;
    avl_node *node;
    int cmp;

    if (!mount) {
        return NULL;
    }
    /* get the root node */
    node = global.source_tree->root->right;
    
    while (node) {
        source = (source_t *)node->key;
        cmp = strcmp(mount, source->mount);
        if (cmp < 0) 
            node = node->left;
        else if (cmp > 0)
            node = node->right;
        else
            return source;
    }
    
    /* didn't find it */
    return NULL;
Jack Moffitt's avatar
Jack Moffitt committed
135 136
}

137 138

/* Search for mount, if the mount is there but not currently running then
Karl Heyes's avatar
Karl Heyes committed
139
 * check the fallback, and so on.  Must have a global source lock to call
140 141 142
 * this function.
 */
source_t *source_find_mount (const char *mount)
Michael Smith's avatar
Michael Smith committed
143
{
144
    source_t *source = NULL;
Michael Smith's avatar
Michael Smith committed
145
    ice_config_t *config;
146 147 148 149
    mount_proxy *mountinfo;
    int depth = 0;

    config = config_get_config();
150
    while (mount && depth < MAX_FALLBACK_DEPTH)
151 152
    {
        source = source_find_mount_raw(mount);
Michael Smith's avatar
Michael Smith committed
153

154
        if (source != NULL && source->running)
155
            break;
Michael Smith's avatar
Michael Smith committed
156

157 158 159 160
        /* we either have a source which is not active (relay) or no source
         * at all. Check the mounts list for fallback settings
         */
        mountinfo = config_find_mount (config, mount);
161
        source = NULL;
162 163 164 165

        if (mountinfo == NULL)
            break;
        mount = mountinfo->fallback_mount;
166
        depth++;
Michael Smith's avatar
Michael Smith committed
167 168
    }

169
    config_release_config();
Michael Smith's avatar
Michael Smith committed
170 171 172 173
    return source;
}


Jack Moffitt's avatar
Jack Moffitt committed
174 175
int source_compare_sources(void *arg, void *a, void *b)
{
176 177
    source_t *srca = (source_t *)a;
    source_t *srcb = (source_t *)b;
Jack Moffitt's avatar
Jack Moffitt committed
178

179
    return strcmp(srca->mount, srcb->mount);
Jack Moffitt's avatar
Jack Moffitt committed
180 181
}

182 183 184 185 186 187

void source_clear_source (source_t *source)
{
    DEBUG1 ("clearing source \"%s\"", source->mount);
    client_destroy(source->client);
    source->client = NULL;
188 189
    source->parser = NULL;
    source->con = NULL;
190

191 192 193 194 195 196 197
    if (source->dumpfile)
    {
        INFO1 ("Closing dumpfile for %s", source->mount);
        fclose (source->dumpfile);
        source->dumpfile = NULL;
    }

198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217
    /* lets kick off any clients that are left on here */
    avl_tree_rlock (source->client_tree);
    while (avl_get_first (source->client_tree))
    {
        avl_delete (source->client_tree,
                avl_get_first (source->client_tree)->key, _free_client);
    }
    avl_tree_unlock (source->client_tree);

    avl_tree_rlock (source->pending_tree);
    while (avl_get_first (source->pending_tree))
    {
        avl_delete (source->pending_tree,
                avl_get_first(source->pending_tree)->key, _free_client);
    }
    avl_tree_unlock (source->pending_tree);

    if (source->format && source->format->free_plugin)
        source->format->free_plugin (source->format);
    source->format = NULL;
218 219 220 221 222 223 224 225 226 227 228 229 230

    /* Lets clear out the source queue too */
    while (source->stream_data)
    {
        refbuf_t *p = source->stream_data;
        source->stream_data = p->next;
        /* can be referenced by burst handler as well */
        while (p->_count > 1)
            refbuf_release (p);
        refbuf_release (p);
    }
    source->stream_data_tail = NULL;

231 232
    if (source->yp_public)
        yp_remove (source->mount);
233

Karl Heyes's avatar
Karl Heyes committed
234 235 236 237
    source->burst_point = NULL;
    source->burst_size = 0;
    source->burst_offset = 0;
    source->queue_size = 0;
238
    source->queue_size_limit = 0;
239 240
    source->listeners = 0;
    source->no_mount = 0;
241
    source->shoutcast_compat = 0;
242
    source->max_listeners = -1;
243
    source->hidden = 0;
244
    source->client_stats_update = 0;
245 246
    util_dict_free (source->audio_info);
    source->audio_info = NULL;
247 248 249 250 251 252 253 254 255

    free(source->fallback_mount);
    source->fallback_mount = NULL;

    free(source->dumpfilename);
    source->dumpfilename = NULL;
}


256
/* Remove the provided source from the global tree and free it */
257
void source_free_source (source_t *source)
Jack Moffitt's avatar
Jack Moffitt committed
258
{
259 260 261 262 263
    DEBUG1 ("freeing source \"%s\"", source->mount);
    avl_tree_wlock (global.source_tree);
    avl_delete (global.source_tree, source, NULL);
    avl_tree_unlock (global.source_tree);

264 265
    avl_tree_free(source->pending_tree, _free_client);
    avl_tree_free(source->client_tree, _free_client);
266 267 268

    free (source->mount);
    free (source);
Jack Moffitt's avatar
Jack Moffitt committed
269

270
    return;
Jack Moffitt's avatar
Jack Moffitt committed
271
}
272

273

274 275 276
client_t *source_find_client(source_t *source, int id)
{
    client_t fakeclient;
277
    void *result;
278 279 280 281 282 283
    connection_t fakecon;

    fakeclient.con = &fakecon;
    fakeclient.con->id = id;

    avl_tree_rlock(source->client_tree);
284
    if(avl_get_by_key(source->client_tree, &fakeclient, &result) == 0)
285 286 287 288 289 290 291 292
    {
        avl_tree_unlock(source->client_tree);
        return result;
    }

    avl_tree_unlock(source->client_tree);
    return NULL;
}
293

294

295 296 297 298 299
/* Move clients from source to dest provided dest is running
 * and that the stream format is the same.
 * The only lock that should be held when this is called is the
 * source tree lock
 */
300 301
void source_move_clients (source_t *source, source_t *dest)
{
302 303 304 305 306
    if (strcmp (source->mount, dest->mount) == 0)
    {
        WARN1 ("src and dst are the same \"%s\", skipping", source->mount);
        return;
    }
307 308 309 310
    /* we don't want the two write locks to deadlock in here */
    thread_mutex_lock (&move_clients_mutex);

    /* if the destination is not running then we can't move clients */
311 312 313

    if (dest->running == 0)
    {
314 315
        WARN1 ("destination mount %s not running, unable to move clients ", dest->mount);
        thread_mutex_unlock (&move_clients_mutex);
316 317 318 319
        return;
    }

    avl_tree_wlock (dest->pending_tree);
320
    do
321
    {
322
        client_t *client;
323

324 325
        /* we need to move the client and pending trees */
        avl_tree_wlock (source->pending_tree);
326

327 328 329
        if (source->format == NULL)
        {
            INFO1 ("source mount %s is not available", source->mount);
330
            break;
331 332 333 334 335 336
        }
        if (source->format->type != dest->format->type)
        {
            WARN2 ("stream %s and %s are of different types, ignored", source->mount, dest->mount);
            break;
        }
337

338 339 340 341 342 343 344
        while (1)
        {
            avl_node *node = avl_get_first (source->pending_tree);
            if (node == NULL)
                break;
            client = (client_t *)(node->key);
            avl_delete (source->pending_tree, client, NULL);
345

Karl Heyes's avatar
Karl Heyes committed
346 347
            /* switch client to different queue */
            client_set_queue (client, dest->stream_data_tail);
348 349 350 351 352 353 354 355 356 357 358 359 360
            avl_insert (dest->pending_tree, (void *)client);
        }

        avl_tree_wlock (source->client_tree);
        while (1)
        {
            avl_node *node = avl_get_first (source->client_tree);
            if (node == NULL)
                break;

            client = (client_t *)(node->key);
            avl_delete (source->client_tree, client, NULL);

Karl Heyes's avatar
Karl Heyes committed
361 362
            /* switch client to different queue */
            client_set_queue (client, dest->stream_data_tail);
363 364 365 366 367 368 369 370 371
            avl_insert (dest->pending_tree, (void *)client);
        }
        source->listeners = 0;
        stats_event (source->mount, "listeners", "0");
        avl_tree_unlock (source->client_tree);

    } while (0);

    avl_tree_unlock (source->pending_tree);
372 373 374 375
    avl_tree_unlock (dest->pending_tree);
    thread_mutex_unlock (&move_clients_mutex);
}

376 377

/* clients need to be start from somewhere in the queue
378 379
 * so we will look for a refbuf which has been previous
 * marked as a sync point */
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395
static void find_client_start (source_t *source, client_t *client)
{
    refbuf_t *refbuf = source->burst_point;

    while (refbuf)
    {
        if (refbuf->sync_point)
        {
            client_set_queue (client, refbuf);
            break;
        }
        refbuf = refbuf->next;
    }
}


Karl Heyes's avatar
Karl Heyes committed
396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413
/* get some data from the source. The stream data is placed in a refbuf
 * and sent back, however NULL is also valid as in the case of a short
 * timeout and there's no data pending.
 */
static refbuf_t *get_next_buffer (source_t *source)
{
    refbuf_t *refbuf = NULL;
    int delay = 250;

    if (source->short_delay)
        delay = 0;
    while (global.running == ICE_RUNNING && source->running)
    {
        int fds;
        time_t current = time (NULL);

        fds = util_timed_wait_for_fd (source->con->sock, delay);

414 415 416 417 418 419 420 421
        if (current >= source->client_stats_update)
        {
            stats_event_args (source->mount, "total_bytes_read",
                    FORMAT_UINT64, source->format->read_bytes);
            stats_event_args (source->mount, "total_bytes_sent",
                    FORMAT_UINT64, source->format->sent_bytes);
            source->client_stats_update = current + 5;
        }
Karl Heyes's avatar
Karl Heyes committed
422 423 424 425 426 427 428 429 430 431 432 433 434
        if (fds < 0)
        {
            if (! sock_recoverable (sock_error()))
            {
                WARN0 ("Error while waiting on socket, Disconnecting source");
                source->running = 0;
            }
            break;
        }
        if (fds == 0)
        {
            if (source->last_read + (time_t)source->timeout < current)
            {
435
                DEBUG3 ("last %ld, timeout %d, now %ld", source->last_read, source->timeout, current);
Karl Heyes's avatar
Karl Heyes committed
436 437 438 439 440 441 442
                WARN0 ("Disconnecting source due to socket timeout");
                source->running = 0;
            }
            break;
        }
        source->last_read = current;
        refbuf = source->format->get_buffer (source);
443 444 445 446 447 448
        if (source->client->con->error)
        {
            INFO1 ("End of Stream %s", source->mount);
            source->running = 0;
            continue;
        }
Karl Heyes's avatar
Karl Heyes committed
449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470
        if (refbuf)
            break;
    }

    return refbuf;
}


/* general send routine per listener.  The deletion_expected tells us whether
 * the last in the queue is about to disappear, so if this client is still
 * referring to it after writing then drop the client as it's fallen too far
 * behind 
 */ 
static void send_to_listener (source_t *source, client_t *client, int deletion_expected)
{
    int bytes;
    int loop = 10;   /* max number of iterations in one go */
    int total_written = 0;

    /* new users need somewhere to start from */
    if (client->refbuf == NULL)
    {
471
        find_client_start (source, client);
Karl Heyes's avatar
Karl Heyes committed
472
        if (client->refbuf == NULL)
473
            return;
Karl Heyes's avatar
Karl Heyes committed
474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497
    }

    while (1)
    {
        /* jump out if client connection has died */
        if (client->con->error)
            break;

        /* lets not send too much to one client in one go, but don't
           sleep for too long if more data can be sent */
        if (total_written > 20000 || loop == 0)
        {
            source->short_delay = 1;
            break;
        }

        loop--;

        bytes = source->format->write_buf_to_client (source->format, client);
        if (bytes <= 0)
            break;  /* can't write any more */

        total_written += bytes;
    }
498
    source->format->sent_bytes += total_written;
Karl Heyes's avatar
Karl Heyes committed
499 500 501 502 503 504 505 506 507 508

    /* the refbuf referenced at head (last in queue) may be marked for deletion
     * if so, check to see if this client is still referring to it */
    if (deletion_expected && client->refbuf == source->stream_data)
    {
        DEBUG0("Client has fallen too far behind, removing");
        client->con->error = 1;
    }
}

Jack Moffitt's avatar
Jack Moffitt committed
509

510
static void source_init (source_t *source)
Jack Moffitt's avatar
Jack Moffitt committed
511
{
512
    ice_config_t *config = config_get_config();
513
    char *listenurl, *str;
514 515
    int listen_url_size;

516
    /* 6 for max size of port */
517
    listen_url_size = strlen("http://") + strlen(config->hostname) +
518
        strlen(":") + 6 + strlen(source->mount) + 1;
519 520 521

    listenurl = malloc (listen_url_size);
    memset (listenurl, '\000', listen_url_size);
522 523
    snprintf (listenurl, listen_url_size, "http://%s:%d%s",
            config->hostname, config->port, source->mount);
524 525
    config_release_config();

526 527 528 529 530 531 532 533
    str = httpp_getvar(source->parser, "ice-audio-info");
    source->audio_info = util_dict_new();
    if (str)
    {
        _parse_audio_info (source, str);
        stats_event (source->mount, "audio_info", str);
    }

534 535
    stats_event (source->mount, "listenurl", listenurl);

536 537 538
    if (listenurl) {
        free(listenurl);
    }
539

540 541 542 543 544 545 546 547 548 549
    if (source->dumpfilename != NULL)
    {
        source->dumpfile = fopen (source->dumpfilename, "ab");
        if (source->dumpfile == NULL)
        {
            WARN2("Cannot open dump file \"%s\" for appending: %s, disabling.",
                    source->dumpfilename, strerror(errno));
        }
    }

550 551 552 553 554 555 556 557
    /* grab a read lock, to make sure we get a chance to cleanup */
    thread_rwlock_rlock (source->shutdown_rwlock);

    /* start off the statistics */
    source->listeners = 0;
    stats_event_inc (NULL, "sources");
    stats_event_inc (NULL, "source_total_connections");
    stats_event (source->mount, "listeners", "0");
558

559
    sock_set_blocking (source->con->sock, SOCK_NONBLOCK);
560

561
    DEBUG0("Source creation complete");
Karl Heyes's avatar
Karl Heyes committed
562
    source->last_read = time (NULL);
563
    source->running = 1;
564

Michael Smith's avatar
Michael Smith committed
565 566
    /*
    ** Now, if we have a fallback source and override is on, we want
567
    ** to steal its clients, because it means we've come back online
Michael Smith's avatar
Michael Smith committed
568 569 570 571
    ** after a failure and they should be gotten back from the waiting
    ** loop or jingle track or whatever the fallback is used for
    */

572 573 574 575
    if (source->fallback_override && source->fallback_mount)
    {
        source_t *fallback_source;

Michael Smith's avatar
Michael Smith committed
576 577 578
        avl_tree_rlock(global.source_tree);
        fallback_source = source_find_mount(source->fallback_mount);

579 580
        if (fallback_source)
            source_move_clients (fallback_source, source);
Michael Smith's avatar
Michael Smith committed
581

582
        avl_tree_unlock(global.source_tree);
Michael Smith's avatar
Michael Smith committed
583
    }
584 585 586 587 588
}


void source_main (source_t *source)
{
Karl Heyes's avatar
Karl Heyes committed
589 590
    unsigned int listeners;
    refbuf_t *refbuf;
591 592 593 594
    client_t *client;
    avl_node *client_node;

    source_init (source);
Michael Smith's avatar
Michael Smith committed
595

596
    while (global.running == ICE_RUNNING && source->running) {
Karl Heyes's avatar
Karl Heyes committed
597
        int remove_from_q;
Jack Moffitt's avatar
Jack Moffitt committed
598

Karl Heyes's avatar
Karl Heyes committed
599
        refbuf = get_next_buffer (source);
600

Karl Heyes's avatar
Karl Heyes committed
601 602
        remove_from_q = 0;
        source->short_delay = 0;
603

Karl Heyes's avatar
Karl Heyes committed
604 605 606 607
        if (refbuf)
        {
            /* append buffer to the in-flight data queue,  */
            if (source->stream_data == NULL)
Michael Smith's avatar
Michael Smith committed
608
            {
Karl Heyes's avatar
Karl Heyes committed
609 610
                source->stream_data = refbuf;
                source->burst_point = refbuf;
611
            }
Karl Heyes's avatar
Karl Heyes committed
612 613 614 615 616 617 618 619 620
            if (source->stream_data_tail)
                source->stream_data_tail->next = refbuf;
            source->stream_data_tail = refbuf;
            source->queue_size += refbuf->len;
            /* new buffer is referenced for burst */
            refbuf_addref (refbuf);

            /* new data on queue, so check the burst point */
            source->burst_offset += refbuf->len;
621
            while (source->burst_offset > source->burst_size)
Karl Heyes's avatar
Karl Heyes committed
622
            {
623 624 625
                refbuf_t *to_release = source->burst_point;

                if (to_release->next)
Karl Heyes's avatar
Karl Heyes committed
626
                {
627 628 629 630
                    source->burst_point = to_release->next;
                    source->burst_offset -= to_release->len;
                    refbuf_release (to_release);
                    continue;
631
                }
632
                break;
633 634
            }

Karl Heyes's avatar
Karl Heyes committed
635 636 637
            /* save stream to file */
            if (source->dumpfile && source->format->write_buf_to_file)
                source->format->write_buf_to_file (source, refbuf);
638
        }
Karl Heyes's avatar
Karl Heyes committed
639 640 641
        /* lets see if we have too much data in the queue, but don't remove it until later */
        if (source->queue_size > source->queue_size_limit)
            remove_from_q = 1;
642 643 644 645

        /* acquire write lock on client_tree */
        avl_tree_wlock(source->client_tree);

Karl Heyes's avatar
Karl Heyes committed
646
        listeners = source->listeners;
647 648 649
        client_node = avl_get_first(source->client_tree);
        while (client_node) {
            client = (client_t *)client_node->key;
Karl Heyes's avatar
Karl Heyes committed
650 651 652

            send_to_listener (source, client, remove_from_q);

653 654 655
            if (client->con->error) {
                client_node = avl_get_next(client_node);
                avl_delete(source->client_tree, (void *)client, _free_client);
Michael Smith's avatar
Michael Smith committed
656
                source->listeners--;
657
                DEBUG0("Client removed");
658 659 660 661 662 663 664 665 666 667 668
                continue;
            }
            client_node = avl_get_next(client_node);
        }

        /* acquire write lock on pending_tree */
        avl_tree_wlock(source->pending_tree);

        /** add pending clients **/
        client_node = avl_get_first(source->pending_tree);
        while (client_node) {
669

Michael Smith's avatar
Michael Smith committed
670
            if(source->max_listeners != -1 && 
671
                    source->listeners >= (unsigned long)source->max_listeners) 
Michael Smith's avatar
Michael Smith committed
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
            {
                /* The common case is caught in the main connection handler,
                 * this deals with rarer cases (mostly concerning fallbacks)
                 * and doesn't give the listening client any information about
                 * why they were disconnected
                 */
                client = (client_t *)client_node->key;
                client_node = avl_get_next(client_node);
                avl_delete(source->pending_tree, (void *)client, _free_client);

                INFO0("Client deleted, exceeding maximum listeners for this "
                        "mountpoint.");
                continue;
            }
            
            /* Otherwise, the client is accepted, add it */
688
            avl_insert(source->client_tree, client_node->key);
Michael Smith's avatar
Michael Smith committed
689 690

            source->listeners++;
691
            DEBUG0("Client added");
692 693 694 695 696 697 698
            stats_event_inc(source->mount, "connections");

            client_node = avl_get_next(client_node);
        }

        /** clear pending tree **/
        while (avl_get_first(source->pending_tree)) {
Michael Smith's avatar
Michael Smith committed
699 700 701
            avl_delete(source->pending_tree, 
                    avl_get_first(source->pending_tree)->key, 
                    source_remove_client);
702 703 704 705 706
        }

        /* release write lock on pending_tree */
        avl_tree_unlock(source->pending_tree);

Karl Heyes's avatar
Karl Heyes committed
707 708 709
        /* update the stats if need be */
        if (source->listeners != listeners)
        {
710
            INFO2("listener count on %s now %ld", source->mount, source->listeners);
Karl Heyes's avatar
Karl Heyes committed
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738
            stats_event_args (source->mount, "listeners", "%d", source->listeners);
        }

        /* lets reduce the queue, any lagging clients should of been
         * terminated by now
         */
        if (source->stream_data)
        {
            /* normal unreferenced queue data will have a refcount 1, but
             * burst queue data will be at least 2, active clients will also
             * increase refcount */
            while (source->stream_data->_count == 1)
            {
                refbuf_t *to_go = source->stream_data;

                if (to_go->next == NULL || source->burst_point == to_go)
                {
                    /* this should not happen */
                    ERROR0 ("queue state is unexpected");
                    source->running = 0;
                    break;
                }
                source->stream_data = to_go->next;
                source->queue_size -= to_go->len;
                refbuf_release (to_go);
            }
        }

739 740 741
        /* release write lock on client_tree */
        avl_tree_unlock(source->client_tree);
    }
Karl Heyes's avatar
Karl Heyes committed
742 743
    source_shutdown (source);
}
Jack Moffitt's avatar
Jack Moffitt committed
744

Michael Smith's avatar
Michael Smith committed
745

Karl Heyes's avatar
Karl Heyes committed
746 747
static void source_shutdown (source_t *source)
{
748
    source->running = 0;
749
    INFO1("Source \"%s\" exiting", source->mount);
750

751 752
    /* we have de-activated the source now, so no more clients will be
     * added, now move the listeners we have to the fallback (if any)
753
     */
754 755 756
    if (source->fallback_mount)
    {
        source_t *fallback_source;
Michael Smith's avatar
Michael Smith committed
757

758 759
        avl_tree_rlock(global.source_tree);
        fallback_source = source_find_mount (source->fallback_mount);
Michael Smith's avatar
Michael Smith committed
760

761 762 763 764 765
        if (fallback_source != NULL)
            source_move_clients (source, fallback_source);

        avl_tree_unlock (global.source_tree);
    }
Jack Moffitt's avatar
Jack Moffitt committed
766

767 768
    /* delete this sources stats */
    stats_event_dec(NULL, "sources");
769
    stats_event(source->mount, NULL, NULL);
Jack Moffitt's avatar
Jack Moffitt committed
770

771 772 773 774
    /* we don't remove the source from the tree here, it may be a relay and
       therefore reserved */
    source_clear_source (source);

775 776 777
    global_lock();
    global.sources--;
    global_unlock();
Jack Moffitt's avatar
Jack Moffitt committed
778

779 780
    /* release our hold on the lock so the main thread can continue cleaning up */
    thread_rwlock_unlock(source->shutdown_rwlock);
Jack Moffitt's avatar
Jack Moffitt committed
781 782
}

783

Jack Moffitt's avatar
Jack Moffitt committed
784 785
static int _compare_clients(void *compare_arg, void *a, void *b)
{
786 787 788 789 790
    client_t *clienta = (client_t *)a;
    client_t *clientb = (client_t *)b;

    connection_t *cona = clienta->con;
    connection_t *conb = clientb->con;
Jack Moffitt's avatar
Jack Moffitt committed
791

792 793
    if (cona->id < conb->id) return -1;
    if (cona->id > conb->id) return 1;
Jack Moffitt's avatar
Jack Moffitt committed
794

795
    return 0;
Jack Moffitt's avatar
Jack Moffitt committed
796 797
}

798
int source_remove_client(void *key)
Jack Moffitt's avatar
Jack Moffitt committed
799
{
800
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
801 802 803 804
}

static int _free_client(void *key)
{
805 806 807 808 809
    client_t *client = (client_t *)key;

    client_destroy(client);
    
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
810
}
811

812
static void _parse_audio_info (source_t *source, const char *s)
813
{
814
    const char *start = s;
Karl Heyes's avatar
Karl Heyes committed
815
    unsigned int len;
816 817 818 819 820 821 822 823 824 825 826 827

    while (start != NULL && *start != '\0')
    {
        if ((s = strchr (start, ';')) == NULL)
            len = strlen (start);
        else
        {
            len = (int)(s - start);
            s++; /* skip passed the ';' */
        }
        if (len)
        {
828
            char name[100], value[200];
829 830
            char *esc;

831
            sscanf (start, "%99[^=]=%199[^;\r\n]", name, value);
832 833 834 835
            esc = util_url_unescape (value);
            if (esc)
            {
                util_dict_set (source->audio_info, name, esc);
836
                stats_event (source->mount, name, esc);
837
                free (esc);
838 839
            }
        }
840
        start = s;
841 842
    }
}
843 844


845
/* Apply the mountinfo details to the source */
846
static void source_apply_mount (source_t *source, mount_proxy *mountinfo)
847
{
848 849 850 851
    char *str;
    int val;
    http_parser_t *parser = NULL;

852
    DEBUG1("Applying mount information for \"%s\"", source->mount);
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987
    if (mountinfo)
    {
        source->max_listeners = mountinfo->max_listeners;
        source->fallback_override = mountinfo->fallback_override;
        source->no_mount = mountinfo->no_mount;
        source->hidden = mountinfo->hidden;
    }

    /* if a setting is available in the mount details then use it, else
     * check the parser details. */

    if (source->client)
        parser = source->client->parser;

    /* public */
    if (mountinfo && mountinfo->yp_public >= 0)
        val = mountinfo->yp_public;
    else
    {
        do {
            str = httpp_getvar (parser, "ice-public");
            if (str) break;
            str = httpp_getvar (parser, "icy-pub");
            if (str) break;
            str = httpp_getvar (parser, "x-audiocast-public");
            if (str) break;
            /* handle header from icecast v2 release */
            str = httpp_getvar (parser, "icy-public");
            if (str) break;
            str = "0";
        } while (0);
        val = atoi (str);
    }
    stats_event_args (source->mount, "public", "%d", val);
    if (source->yp_public != val)
    {
        DEBUG1 ("YP changed to %d", val);
        if (val)
            yp_add (source->mount);
        else
            yp_remove (source->mount);
        source->yp_public = val;
    }

    /* stream name */
    if (mountinfo && mountinfo->stream_name)
        str = mountinfo->stream_name;
    else
    {
        do {
            str = httpp_getvar (parser, "ice-name");
            if (str) break;
            str = httpp_getvar (parser, "icy-name");
            if (str) break;
            str = httpp_getvar (parser, "x-audiocast-name");
            if (str) break;
            str = "Unspecified name";
        } while (0);
    }
    stats_event (source->mount, "server_name", str);

    /* stream description */
    if (mountinfo && mountinfo->stream_description)
        str = mountinfo->stream_description;
    else
    {
        do {
            str = httpp_getvar (parser, "ice-description");
            if (str) break;
            str = httpp_getvar (parser, "icy-description");
            if (str) break;
            str = httpp_getvar (parser, "x-audiocast-description");
            if (str) break;
            str = "Unspecified description";
        } while (0);
    }
    stats_event (source->mount, "server_description", str);

    /* stream URL */
    if (mountinfo && mountinfo->stream_url)
        str = mountinfo->stream_url;
    else
    {
        do {
            str = httpp_getvar (parser, "ice-url");
            if (str) break;
            str = httpp_getvar (parser, "icy-url");
            if (str) break;
            str = httpp_getvar (parser, "x-audiocast-url");
            if (str) break;
        } while (0);
    }
    stats_event (source->mount, "server_url", str);

    /* stream genre */
    if (mountinfo && mountinfo->stream_genre)
        str = mountinfo->stream_genre;
    else
    {
        do {
            str = httpp_getvar (parser, "ice-genre");
            if (str) break;
            str = httpp_getvar (parser, "icy-genre");
            if (str) break;
            str = httpp_getvar (parser, "x-audiocast-genre");
            if (str) break;
            str = "various";
        } while (0);
    }
    stats_event (source->mount, "genre", str);

    /* stream bitrate */
    if (mountinfo && mountinfo->bitrate)
        str = mountinfo->bitrate;
    else
    {
        do {
            str = httpp_getvar (parser, "ice-bitrate");
            if (str) break;
            str = httpp_getvar (parser, "icy-br");
            if (str) break;
            str = httpp_getvar (parser, "x-audiocast-bitrate");
        } while (0);
    }
    stats_event (source->mount, "bitrate", str);

    /* handle MIME-type */
    if (mountinfo && mountinfo->type)
        stats_event (source->mount, "server_type", mountinfo->type);
    else
        if (source->format)
            stats_event (source->mount, "server_type", source->format->contenttype);

    if (mountinfo && mountinfo->subtype)
        stats_event (source->mount, "subtype", mountinfo->subtype);
988

989 990 991
    if (mountinfo && mountinfo->fallback_mount)
    {
        char *mount = source->fallback_mount;
992
        source->fallback_mount = strdup (mountinfo->fallback_mount);
993 994 995 996
        free (mount);
    }
    else
        source->fallback_mount = NULL;
997

998
    if (mountinfo && mountinfo->auth_type != NULL && source->authenticator == NULL)
999 1000 1001
    {
        source->authenticator = auth_get_authenticator(
                mountinfo->auth_type, mountinfo->auth_options);
1002
        stats_event(source->mount, "authenticator", mountinfo->auth_type);
1003
    }
1004 1005

    if (mountinfo && mountinfo->dumpfile)
1006
    {
1007
        char *filename = source->dumpfilename;
1008
        source->dumpfilename = strdup (mountinfo->dumpfile);
1009
        free (filename);
1010
    }
1011 1012
    else
        source->dumpfilename = NULL;
1013

1014
    if (mountinfo && mountinfo->queue_size_limit)
1015
        source->queue_size_limit = mountinfo->queue_size_limit;
1016

1017
    if (mountinfo && mountinfo->source_timeout)
1018
        source->timeout = mountinfo->source_timeout;
1019

1020
    if (mountinfo && mountinfo->burst_size >= 0)
1021 1022
        source->burst_size = (unsigned int)mountinfo->burst_size;

1023 1024
    if (source->format && source->format->apply_settings)
        source->format->apply_settings (source->client, source->format, mountinfo);
1025 1026 1027
}


1028 1029 1030 1031
/* update the specified source with details from the config or mount.
 * mountinfo can be NULL in which case default settings should be taken
 */
void source_update_settings (ice_config_t *config, source_t *source, mount_proxy *mountinfo)
1032 1033 1034 1035 1036 1037
{
    /* set global settings first */
    source->queue_size_limit = config->queue_size_limit;
    source->timeout = config->source_timeout;
    source->burst_size = config->burst_size;

1038
    source_apply_mount (source, mountinfo);
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059

    if (source->fallback_mount)
        DEBUG1 ("fallback %s", source->fallback_mount);
    if (source->dumpfilename)
        DEBUG1 ("Dumping stream to %s", source->dumpfilename);
    if (source->hidden)
    {
        stats_event_hidden (source->mount, NULL, 1);
        DEBUG0 ("hidden from xsl");
    }
    else
        stats_event_hidden (source->mount, NULL, 0);

    if (source->max_listeners == -1)
        stats_event (source->mount, "max_listeners", "unlimited");
    else
    {
        char buf [10];
        snprintf (buf, sizeof (buf), "%lu", source->max_listeners);
        stats_event (source->mount, "max_listeners", buf);
    }
1060 1061
    DEBUG1 ("public set to %d", source->yp_public);
    DEBUG1 ("max listeners to %ld", source->max_listeners);
1062 1063 1064 1065 1066 1067
    DEBUG1 ("queue size to %u", source->queue_size_limit);
    DEBUG1 ("burst size to %u", source->burst_size);
    DEBUG1 ("source timeout to %u", source->timeout);
}


1068 1069 1070
void *source_client_thread (void *arg)
{
    source_t *source = arg;
1071 1072 1073 1074 1075
    const char ok_msg[] = "HTTP/1.0 200 OK\r\n\r\n";
    int bytes;

    source->client->respcode = 200;
    bytes = sock_write_bytes (source->client->con->sock, ok_msg, sizeof (ok_msg)-1);
1076
    if (bytes < (int)(sizeof (ok_msg)-1))
1077 1078 1079 1080 1081
    {
        global_lock();
        global.sources--;
        global_unlock();
        WARN0 ("Error writing 200 OK message to source client");
1082 1083
        source_free_source (source);
        return NULL;
1084
    }
1085

1086 1087 1088 1089 1090
    stats_event_inc(NULL, "source_client_connections");
    stats_event (source->mount, "listeners", "0");

    source_main (source);

1091
    source_free_source (source);
1092
    source_recheck_mounts ();
1093

1094 1095 1096
    return NULL;
}

1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115

/* rescan the mount list, so that xsl files are updated to show
 * unconnected but active fallback mountpoints
 */
void source_recheck_mounts (void)
{
    ice_config_t *config = config_get_config();
    mount_proxy *mount = config->mounts;

    avl_tree_rlock (global.source_tree);

    while (mount)
    {
        source_t *source = source_find_mount (mount->mountname);

        if (source)
        {
            source = source_find_mount_raw (mount->mountname);
            if (source)
1116 1117 1118 1119
            {
                mount_proxy *mountinfo = config_find_mount (config, source->mount);
                source_update_settings (config, source, mountinfo);
            }
1120 1121
            else
            {
1122
                stats_event_hidden (mount->mountname, NULL, mount->hidden);
1123 1124 1125 1126 1127 1128 1129
                stats_event (mount->mountname, "listeners", "0");
                if (mount->max_listeners < 0)
                    stats_event (mount->mountname, "max_listeners", "unlimited");
                else
                    stats_event_args (mount->mountname, "max_listeners", "%d", mount->max_listeners);
            }
        }
1130 1131
        else
            stats_event (mount->mountname, NULL, NULL);
1132 1133 1134 1135 1136 1137 1138

        mount = mount->next;
    }
    avl_tree_unlock (global.source_tree);
    config_release_config();
}